Identifying impact factors and spatial variability of pollutants is essential for understanding environmental exposure and devising solutions. This research focused on PM_2.5 as the target pollutant and developed land use regression models specific to the Shenyang metropolitan area in 2020. Utilizing the Least Absolute Shrinkage and Selection Operator approach, models were developed for all seasons and for the annual average, explaining 62–70% of the variability in PM_2.5 concentrations. Among the predictors, surface pressure exhibited a positive correlation with PM_2.5 concentrations throughout most of the year. Conversely, both elevation and tree cover had negative effects on PM_2.5 levels. At a 2000 m scale, landscape aggregation decreased PM_2.5 levels, while at a larger scale (5000 m), landscape splitting facilitated PM_2.5 dispersion. According to the partial R² results, vegetation-related land use types were significant, with the shrubland proportion positively correlated with local-scale PM_2.5 concentrations in spring. Bare vegetation areas were the primary positive factor in autumn, whereas the mitigating effect of tree cover contrasted with this trend, even in winter. The NDVI, an index used to assess vegetation growth, was not determined to be a primary influencing factor. The findings reaffirm the function of vegetation cover in reducing PM_2.5. Based on the research, actionable strategies for PM_2.5 pollution control were outlined to promote sustainable development in the region.

微塑料（<5 mm）作为新型环境污染物, 广泛分布于水体、土壤及大气环境中, 对生态系统及人类健康构成严重威胁. 传统处理技术(如焚烧、填埋等)存在二次污染风险, 成本效益比低等缺点, 亟需开发绿色降解途径. 微生物具有分解高分子聚合物的代谢能力, 是微塑料降解的核心生物要素, 部分细菌和真菌已被证明能将其转化为环保的碳化合物. 在好氧与厌氧这两种典型氧化还原环境下的微生物群落结构、代谢途径及降解效率存在明显差异. 基于此, 本综述系统总结了微塑料的分布与来源, 及其物理化学性质对微生物的影响. 探讨了微生物在有氧与无氧条件下对微塑料的降解机制, 为开发高效生物降解技术, 制定微塑料污染控制策略提供重要的理论依据.

Rapid industrialization, urbanization, resource exploitation, and energy use have caused global pollution and ecological degradation, hindering sustainable development. Functionally versatile microbes are eco-friendly resources for addressing environmental problems. Geobacter, a vital genus featuring outstanding extracellular electron transfer (EET), has drawn widespread research interest, with studies centered on EET mechanisms, microbial fuel cells, biogeochemical cycling and environmental bioremediation. Though valuable across energy, environmental and geoscience disciplines, a systematic bibliometric review of Geobacter research evolution is absent. This paper fills the gap via comprehensive bibliometric analysis of 2000–2026 Web of Science Core Collection papers covering Geobacter and the closely related genus Trichlorobacter, recently re-established as a standalone genus, focusing on bioremediation, dissimilatory Fe(III) reduction, microbial electrochemistry and biogeochemical cycles. This bibliometric profiling clarifies the evolving research frontiers in electroactive microbe-mediated environmental remediation and geochemical cycling, delivering refined scientific implications and actionable theoretical guidance for future ecological restoration and pollution remediation practices.

Organohalide-respiring bacteria (OHRB) facilitate the reductive dehalogenation of toxic halogenated compounds in the environment, which supports their growth and proliferation. Research conducted on OHRB has achieved notable advancements. However, given the intricacy of the ecosystem and the methodologies employed for microbial isolation, numerous constraints persist. Further exploration is imperative to elucidate the physiological characteristics, ecological functions, and technological applications of OHRB. This study aimed to evaluate the outcomes and insights of prior research via a bibliometric analysis of three obligate OHRB genera—Dehalococcoides, Dehalobacter, and Dehalogenimonas—over a three-decade period from 1994 to 2024, based on the Web of Science (WOS) database. The results show that research on these three bacterial genera has advanced in sequence since the initiation of studies in this field. The research area encompasses the identification and isolation of novel OHRB species, the gene sequencing of related enzymes, and the role of microorganisms in the remediation of environmental pollutants, reflecting a gradual transition from individual investigations of OHRB to the applications of microorganisms in remediating complex environmental pollution. This study systematically reviewed the past research history of this field and conducted an in-depth analysis of research hotspots. The integration of this analysis with technological development trends and practical application requirements provides a theoretical basis and innovative concepts for future research directions in the field of ecological environment restoration.